Best Online Co-Op Games Under $20
The 25 highest-rated online co-op games you can get for under $20, ranked by Steam reviews, with the cheapest key across 21 stores.
- #197% of 276,534 Steam reviews
2023Lethal Company
$9.99 -21%$7.84difmark & 7 storesOnline Co-OpHorrorFirst-PersonSteam97%DeckplatinumView All Prices$9.99 -21%$7.84difmark & 7 stores - #297% of 230,601 Steam reviews
2018Bloons TD 6
$13.99 -3%$13.48GameSeal & 14 storesTower DefenseStrategyMultiplayerSteam97%Achieve156DeckplatinumView All Prices$13.99 -3%$13.48GameSeal & 14 stores - #397% of 138,726 Steam reviews
2025R.E.P.O.
$9.99 -35%$6.49steam & 6 storesHorrorOnline Co-OpMultiplayerSteam97%DeckplatinumView All Prices$9.99 -35%$6.49steam & 6 stores - #497% of 46,314 Steam reviews
2012Castle Crashers
$14.99 -21%$11.80gamivo & 9 stores2DOnline Co-OpCo-opSteam97%Achieve12DeckplatinumView All Prices$14.99 -21%$11.80gamivo & 9 stores - #597% of 17,137 Steam reviews
- #696% of 144,450 Steam reviews
2025Peak
$7.99 -63%$2.91difmark & 14 storesMultiplayerOnline Co-OpCo-opSteam96%Achieve64DeckplatinumView All Prices$7.99 -63%$2.91difmark & 14 stores - #796% of 20,174 Steam reviews
2026Far Far West
$19.99 -60%$7.91PlaySum & 29 storesOnline Co-OpPvEWesternSteam96%DeckplatinumView All Prices$19.99 -60%$7.91PlaySum & 29 stores - #896% of 37,709 Steam reviews
2024Planet Crafter
$23.99 -41%$14.09gamivo & 4 storesBase BuildingOpen World Survival CraftSurvivalSteam96%Achieve55DeckgoldView All Prices$23.99 -41%$14.09gamivo & 4 stores - #996% of 36,728 Steam reviews
2021Gunfire Reborn
$19.99 -54%$9.14driffle & 18 storesRogueliteRoguelikeFPSSteam96%Achieve134DeckgoldView All Prices$19.99 -54%$9.14driffle & 18 stores - #1096% of 28,755 Steam reviews
2026How to Fish
$7.99 -24%$6.02difmark & 4 storesMultiplayerOnline Co-OpCo-opSteam96%Achieve31View All Prices$7.99 -24%$6.02difmark & 4 stores - #1195% of 359,511 Steam reviews
2020Phasmophobia
$19.99 -34%$13.05gamivo & 8 storesHorrorOnline Co-OpMultiplayerSteam95%Achieve54DeckgoldView All Prices$19.99 -34%$13.05gamivo & 8 stores - #1297% of 9,209 Steam reviews
- #1394% of 263,538 Steam reviews
2026Valheim
$29.99 -34%$19.75driffle & 23 storesOpen World Survival CraftSurvivalOnline Co-OpSteam94%Achieve53DeckplatinumView All Prices$29.99 -34%$19.75driffle & 23 stores - #1498% of 1,770 Steam reviews
2026Flock Around
$4.99 -84%Historic Low $0.77kinguin & 3 storesMultiplayerOnline Co-OpCreature CollectorSteam98%Achieve31View All Prices$4.99 -84%Historic Low $0.77kinguin & 3 stores - #1596% of 13,717 Steam reviews
2023Roboquest
$24.99 -51%$12.06difmark & 33 storesFPSAction RoguelikeRogueliteSteam96%Achieve86DeckgoldView All Prices$24.99 -51%$12.06difmark & 33 stores - #1696% of 5,941 Steam reviews
2016Earth Defense Force 4.1: The Shadow of New Despair
$19.99 -87%$2.41difmark & 24 storesActionThird-Person ShooterCo-opSteam96%Achieve51DeckgoldView All Prices$19.99 -87%$2.41difmark & 24 stores - #1794% of 99,245 Steam reviews
2015Dying Light
$24.99 -91%$2.14k4g & 59 storesZombiesSurvival HorrorHorrorSteam94%Achieve78DeckplatinumView All Prices$24.99 -91%$2.14k4g & 59 stores - #1895% of 16,727 Steam reviews
2023Risk of Rain Returns
$14.99 -95%$0.65GameSeal & 24 storesAction RoguelikeOnline Co-OpMultiplayerSteam95%Achieve155DeckplatinumView All Prices$14.99 -95%$0.65GameSeal & 24 stores - #1996% of 5,627 Steam reviews
2019Earth Defense Force 5
$59.99 -91%$5.33driffle & 23 storesActionOnline Co-OpThird-Person ShooterSteam96%Achieve39DeckplatinumView All Prices$59.99 -91%$5.33driffle & 23 stores - #2096% of 2,384 Steam reviews
2026Sledding Game
$7.99 -49%$4.00eneba & 9 storesMultiplayerOnline Co-OpCuteSteam96%Achieve37DeckplatinumView All Prices$7.99 -49%$4.00eneba & 9 stores - #2194% of 35,247 Steam reviews
2024Content Warning
$7.99 -58%$3.34driffle & 22 storesOnline Co-OpHorrorProcedural GenerationSteam94%Achieve48DeckplatinumView All Prices$7.99 -58%$3.34driffle & 22 stores - #2295% of 6,240 Steam reviews
2025Species: Unknown
$9.99 -20%$7.99steam & 2 storesHorrorOnline Co-OpFirst-PersonSteam95%DeckplatinumView All Prices$9.99 -20%$7.99steam & 2 stores - #2395% of 7,357 Steam reviews
2012Sins of a Solar Empire: Rebellion
$19.99 -86%Historic Low $2.73driffle & 33 storesManagementDiplomacyOnline Co-OpSteam95%Achieve68DeckgoldView All Prices$19.99 -86%Historic Low $2.73driffle & 33 stores - #2492% of 381,693 Steam reviews
2018Among Us
$4.99 -49%$2.51gamivo & 21 storesMultiplayerSocial DeductionOnline Co-OpSteam92%Achieve33DeckgoldView All Prices$4.99 -49%$2.51gamivo & 21 stores - #2595% of 4,826 Steam reviews
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